FR2432874A1 - Machine a lancer des balles de tennis - Google Patents

Machine a lancer des balles de tennis

Info

Publication number
FR2432874A1
FR2432874A1 FR7920299A FR7920299A FR2432874A1 FR 2432874 A1 FR2432874 A1 FR 2432874A1 FR 7920299 A FR7920299 A FR 7920299A FR 7920299 A FR7920299 A FR 7920299A FR 2432874 A1 FR2432874 A1 FR 2432874A1
Authority
FR
France
Prior art keywords
ball launching
tennis ball
launching machine
machine
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7920299A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCHWAB FELLER WALTER
Original Assignee
SCHWAB FELLER WALTER
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SCHWAB FELLER WALTER filed Critical SCHWAB FELLER WALTER
Publication of FR2432874A1 publication Critical patent/FR2432874A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
    • A63B69/409—Stationarily-arranged devices for projecting balls or other bodies with pneumatic ball- or body-propelling means

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Toys (AREA)

Abstract

La machine comporte un magasin à balles à partir duquel les balles arrivent une à une à un tube dans lequel elles sont poussées par une pression d'air contre un rétrécissement pou vant s'élargir et par lequel chaque balle est retenue, jusqu'à ce qu'une surpression déterminée se constitue dans le tube, pour être ensuite éjectée sous l'effet de ladite surpression.
FR7920299A 1978-08-09 1979-08-08 Machine a lancer des balles de tennis Withdrawn FR2432874A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH846478 1978-08-09

Publications (1)

Publication Number Publication Date
FR2432874A1 true FR2432874A1 (fr) 1980-03-07

Family

ID=4340776

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7920299A Withdrawn FR2432874A1 (fr) 1978-08-09 1979-08-08 Machine a lancer des balles de tennis

Country Status (4)

Country Link
DE (1) DE2930875A1 (fr)
FR (1) FR2432874A1 (fr)
GB (1) GB2031736A (fr)
IT (1) IT1122465B (fr)

Also Published As

Publication number Publication date
DE2930875A1 (de) 1980-02-14
GB2031736A (en) 1980-04-30
IT1122465B (it) 1986-04-23
IT7925039A0 (it) 1979-08-09

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Legal Events

Date Code Title Description
ST Notification of lapse